Two new Polygyroid helicoids from northern California
Berry, S. S.
Article
1939
The Nautilus
53
56--61
BioStor
English
Melbourne, Fla., etc American Malacologists, inc., etc
BioStor: https://biostor.org/reference/131453
In copyright. Digitized with the permission of the rights holder.
https://biodiversitylibrary.org/permissions
http://creativecommons.org/licenses/by-nc-sa/3.0/
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